Using GTP and glabel for ZFS arrays

Jeremy Chadwick freebsd at
Thu Jul 22 06:59:43 UTC 2010

On Thu, Jul 22, 2010 at 02:32:48AM -0400, Dan Langille wrote:
> On 7/21/2010 11:39 PM, Adam Vande More wrote:
> >On Wed, Jul 21, 2010 at 10:34 PM, Adam Vande More <amvandemore at
> ><mailto:amvandemore at>> wrote:
> >Also if you have an applicable SATA controller, running the ahci module
> >with give you more speed.  Only change one thing a time though.
> >Virtualbox makes a great testbed for this, you don't need to allocate
> >the VM a lot of RAM just make sure it boots and such.
> I'm not sure of the criteria, but this is what I'm running:
> atapci0: <SiI 3124 SATA300 controller> port 0xdc00-0xdc0f mem
> 0xfbeffc00-0xfbeffc7f,0xfbef0000-0xfbef7fff irq 17 at device 4.0 on
> pci7
> atapci1: <SiI 3124 SATA300 controller> port 0xac00-0xac0f mem
> 0xfbbffc00-0xfbbffc7f,0xfbbf0000-0xfbbf7fff irq 19 at device 4.0 on
> pci3
> I added ahci_load="YES" to loader.conf and rebooted.  Now I see:
> ahci0: <ATI IXP700 AHCI SATA controller> port
> 0x8000-0x8007,0x7000-0x7003,0x6000-0x6007,0x5000-0x5003,0x4000-0x400f
> mem 0xfb3fe400-0xfb3fe7ff irq 22 at device 17.0 on pci0
> Which is the onboard SATA from what I can tell, not the controllers
> I installed to handle the ZFS array.  The onboard SATA runs a
> gmirror array which handles /, /tmp, /usr, and /var (i.e. the OS).
> ZFS runs only on on my /storage mount point.

The Silicon Image controllers have their own driver, siis(4), which uses
AHCI as well.  It's just as reliable as ahci(4), and undergoes
similar/thorough testing.

| Jeremy Chadwick                                   jdc at |
| Parodius Networking              |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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